Revell Big Boy Locomotive Description Big Boy Locomotive From the Manufacturer The American Big Boys are some of the longest and largest steam locomotives ever built anywhere in the world, capable of hauling a 3,600 ton train. The 25 Big Boy locomotives were built in 2 groups. The first group, called the Class 1, was built from 1941. The second, Class 2, was built in 1944. Most Big Boys were retired from service in 1961. Features: Detailed driver's cab Movable Wheels 87 parts, skill level 3 Decals for 2 Union Pacific versions Illustrated assembly instructions Product Details: Product Dimensions: 15.2 x 9.76 x 2.64 inches Item Weight: 14.3 ounces Item model number: 80-2165 Manufacturer recommended age: 10 years and up Batteries: 1 Unknown batteries required. Is Discontinued By Manufacturer: No Manufacturer: Revell Date First Available: May 3, 2007